diff --git a/hw/nvram/ds1225y.c b/hw/nvram/ds1225y.c
index ad7345f288..b6ef463db0 100644
--- a/hw/nvram/ds1225y.c
+++ b/hw/nvram/ds1225y.c
@@ -25,6 +25,7 @@
 #include "qemu/osdep.h"
 #include "hw/sysbus.h"
 #include "trace.h"
+#include "qemu/error-report.h"
 
 typedef struct {
     MemoryRegion iomem;
@@ -113,7 +114,7 @@ typedef struct {
     NvRamState nvram;
 } SysBusNvRamState;
 
-static int nvram_sysbus_initfn(SysBusDevice *dev)
+static void nvram_sysbus_realize(DeviceState *dev, Error **errp)
 {
     SysBusNvRamState *sys = DS1225Y(dev);
     NvRamState *s = &sys->nvram;
@@ -123,20 +124,18 @@ static int nvram_sysbus_initfn(SysBusDevice *dev)
 
     memory_region_init_io(&s->iomem, OBJECT(s), &nvram_ops, s,
                           "nvram", s->chip_size);
-    sysbus_init_mmio(dev, &s->iomem);
+    sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);
 
     /* Read current file */
     file = s->filename ? fopen(s->filename, "rb") : NULL;
     if (file) {
         /* Read nvram contents */
         if (fread(s->contents, s->chip_size, 1, file) != 1) {
-            printf("nvram_sysbus_initfn: short read\n");
+            error_report("nvram_sysbus_realize: short read");
         }
         fclose(file);
     }
     nvram_post_load(s, 0);
-
-    return 0;
 }
 
 static Property nvram_sysbus_properties[] = {
@@ -148,9 +147,8 @@ static Property nvram_sysbus_properties[] = {
 static void nvram_sysbus_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
-    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 
-    k->init = nvram_sysbus_initfn;
+    dc->realize = nvram_sysbus_realize;
     dc->vmsd = &vmstate_nvram;
     dc->props = nvram_sysbus_properties;
 }